Printable Hard Sudoku

Set 1rc8jrd. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
8 7 2
2 6
5 4 8 7
3
9 7 3 4 6 1
6 8 4
3 4 2 7
2 6 5
8 4 2
Hard #2
2 4 5
5 3 8
8 5 2 3
6 5 8
1 2 7
2 7 3
8 1
6 5 7
2 1 9 8 4
Hard #3
1 2 7 8
4 2 3 6
9 2 4
8 4 3 6
1
8 2
2 5 8 6 1 9
2 6
3 9 5
Hard #4
2 1 9
3 1
1 4 8 2
8 6 5 2
9 8
9 4 3 7
7 4 5
1 9 5 4 3
4 2
Hard #5
5 8 9
9 3 1
1 3 2 6
4 2
4 5 8 3
7 3
6 2 9 3
8 2 6 4
9 8 7
Hard #6
5 9 6
4 7 1 6
7 1 2 5
8 1
7 5 4
4 3 5
9 7 2 8
4 5 6 9
7 9
Hard #7
6 1
3 1 7 5 9
7 2 8
7 9 8 3 2
5 6 4 7
5 1
6 7 2 8
8 5 9 1
Hard #8
2 5 9 7
3 4 2 9
7 6 2
2 7 4 3
5 3 9 1
6 2 7
1 7 6
6 8 4
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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